Did I do the right thing against my running partner? Was this self defense?

I (17M) am a school student right now. I have this family friend named Angela (36F). Angela is ethnically South Korean, and she looks like a really adorable anime girl! (I am a White American and am on the spectrum, and I'm fascinated with Korean and Japanese culture). She has very beautiful, shoulder-length black hair and thick bangs. With that being said, once you get past appearances, Angie is a total tomboy, and she's been doing Tae Kwon Do ever since she was 7 years old. She's served in the USAF Reserves and she runs every day these days. I have run a marathon with her and we run together whenever we can. I am so in love with her, and I think I'm obsessed about her actually. Even though I have sexual feelings for her, she always calls herself my "older sister". I've known her ever since I was 3 years old!

I myself am not familiar at all with Tae Kwon Do. But just to get closer with Angie and to be alone with her, in July this year, I asked her to be my teacher in learning this martial art. She was excited about it, and she happily said yes.

On the very first session, shortly before my 17th birthday, Angela drove me to a small outdoor open-roof arena/stadium sort of place for us to train. There was nobody there but me and her. It was an extremely hot and humid day, so while we were at her house, before we got in the car, she took her shirt off, and she stripped down to a black, low-cut spaghetti strap sports bra and basketball shorts. She left her shirt at her house so all she was wearing for the entire day was a bra and shorts. This was the first time I've ever seen her show off so much skin, and I got so fascinated and idk, I just came up from behind her and put my hands on her bare shoulders. She gasped and acted surprised. From then on, she started sweating nonstop to the point where she was shiny. I also did see tears coming out of her eyes while she was driving, and she bit her lower lip a lot. I remember that when she got out of her car, her seat was drenched in her sweat. We didn't even begin our session and she was already sweating!

During our session, I couldn't help myself, and I attempted to gently touch her breasts. She responded by panicking and she punched me hard. It simultaneously scared me because she's much taller than me and physically stronger than me, and it pissed me off extremely because I didn't expect her to genuinely hit me. She's always been the kind of woman to dote on me and take care of me. It hurt so badly, and after she punched me, she covered her chest with her arms and she started crying. From this point on, she never regained her composure, and she kept on crying and sweating. She also kept grabbing and stroking her ponytail, which I and my parents know is something she only does whenever she's nervous. And whenever her arms weren't occupied, they were always tightly crossed over her chest, as if she thought I wanted to touch her again.

Honestly, we did not spend much, if any time, doing Tae Kwon Do. I just sat with Angela on the bleachers for an hour while she was hugging her chest and crying and acting gross with her sweat....this was the first time I've stopped feeling sexual feelings for her. I tried patting her on the back and reminding her of funny stories from when I was a little boy, but she wasn't laughing.

An hour into our session, when she sensed that I was angry as hell about the time she punched me, she started outright bawling and tried running out of the arena. I tripped her, just because I wanted to get back at her, and she screamed and fell. She was on the ground, crying and saying "oh my god please" and she was trying to crawl away, and I almost stomped her back but I resisted the urge.